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The formation of volatile corrosion products during the mixed oxidation-chlorination of cobalt at 650 °C

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Abstract

The reaction of cobalt with 1 pct Cl2 in 1,10, and 50 pct O2/Ar atmospheres has been studied at 650 °C with thermogravimetry and mass spectrometry. The principal vapor species appear to be CoCl2 and CoCl3. In all cases, CoCl2 (s) forms at the oxide/metal interface and equilibration of the volatile chlorides with Co3O4 does not occur in the early stages of the reaction. In the 1 pct C12-1 pct O2-Ar case, continuous volatilization occurs. In the 1 pct C12-10 pct O2-Ar and 1 pct C12-50 pct O2-Ar cases, volatilization occurs only in the first few minutes of reaction. Afterwards, the reaction is predominantly oxidation.

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Authors and Affiliations

  1. NASA Lewis Research Center, 44135, Cleveland, OH

    N. S. Jacobson (Materials Scientist)

  2. The University of Illinois at Chicago, 60680, Chicago, IL

    M. J. McNallan (Associate Professor of Metallurgy) & Y. Y. Lee (Graduate Student)

Authors
  1. N. S. Jacobson
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  2. M. J. McNallan
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  3. Y. Y. Lee
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Jacobson, N.S., McNallan, M.J. & Lee, Y.Y. The formation of volatile corrosion products during the mixed oxidation-chlorination of cobalt at 650 °C. Metall Trans A 17, 1223–1228 (1986). https://doi.org/10.1007/BF02665322

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  • DOI: https://doi.org/10.1007/BF02665322

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